Derivative Financial Instruments (Details 3) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Derivative Instruments, Gain (Loss)
Amount of gain (loss) recognized in income on derivatives	$ 246	$ 54	$ 378	$ 59
Gain (loss) recognized in earnings attributable to risk being hedged	(46)	(226)	40	(264)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, Effective Portion Recognized in AOCI	(319)	1,100	(706)	1,977
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, Effective Portion Reclassified from AOCI to Earnings	(227)	50	(328)	(146)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, (Ineffectiveness) and Amounts Excluded from Effectiveness Testing	(5)	(2)	(5)	(8)
Interest rate contracts | Derivative instruments in fair value hedging relationships | Cost of financing
Derivative Instruments, Gain (Loss)
Amount of gain (loss) recognized in income, recognized on derivative instruments in fair value hedges	68	185	60	256
Gain (loss) recognized in earnings attributable to risk being hedged	(27)	(142)	24	(166)
Interest rate contracts | Derivative instruments in fair value hedging relationships | Interest expense
Derivative Instruments, Gain (Loss)
Amount of gain (loss) recognized in income, recognized on derivative instruments in fair value hedges	48	109	41	150
Gain (loss) recognized in earnings attributable to risk being hedged	(19)	(84)	16	(98)
Interest rate contracts | Derivative instruments in cash flow hedging relationships | Interest expense
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, Effective Portion Reclassified from AOCI to Earnings	(2)	(2)	(4)	(4)
Foreign exchange contracts | Derivative instruments in net investment hedging relationships | Interest expense
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, Effective Portion Reclassified from AOCI to Earnings	0	0		0
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, (Ineffectiveness) and Amounts Excluded from Effectiveness Testing	(4)	(1)	(5)	(1)
Foreign exchange contracts | Derivative instruments not designated as hedging instruments | Other (income) and expense
Derivative Instruments, Gain (Loss)
Amount of gain (loss) recognized in income on derivatives	117	(177)	205	(305)
Foreign exchange contracts | Derivative instruments in cash flow hedging relationships | Other (income) and expense
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, Effective Portion Reclassified from AOCI to Earnings	(123)	40	(170)	(14)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, (Ineffectiveness) and Amounts Excluded from Effectiveness Testing	(1)	(1)	0	(7)
Foreign exchange contracts | Derivative instruments in cash flow hedging relationships | Cost of sales
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, Effective Portion Reclassified from AOCI to Earnings	(69)	6	(103)	(83)
Foreign exchange contracts | Derivative instruments in cash flow hedging relationships | Selling, general and administrative expense
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, Effective Portion Reclassified from AOCI to Earnings	(33)	6	(51)	(45)
Equity contracts | Derivative instruments not designated as hedging instruments | Selling, general and administrative expense
Derivative Instruments, Gain (Loss)
Amount of gain (loss) recognized in income on derivatives	13	(63)	72	(42)
Foreign exchange contracts | Derivative instruments in cash flow hedging relationships
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, Effective Portion Recognized in AOCI	(217)	760	(454)	1,390
Foreign exchange contracts | Derivative instruments in net investment hedging relationships
Derivative Instruments, Gain (Loss)
Gain (Loss) Recognized in Earnings and Other Comprehensive Income, Effective Portion Recognized in AOCI	$ (102)	$ 340	$ (252)	$ 587